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[ccp4bb]: NCS analysis
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Forwarded message. DON'T REPLY TO ME!!
Reply to Trixie Wagner bw6f@unix.mail.virginia.edu
> Dear all,
>
> I have a question not strictly related to ccp4 but it is of general
> interest, I think.
>
> I am working on the structure of a tetramer with non-crystallographic 222
> symmetry. It is not difficult to determine the three two-fold axes
> separately by superimposing dimers, but
> a) they are not necessarily perpendicular to each other and/or might not
> intersect in one point and
> b) from the direction cosines of the axes you cannot conclude where
> exactly to put the two-folds with respect to the tetramer (i.e.
> where the origin of the 222 system is located).
>
> I would need this information e.g. to compare two of my structures by
> superimposing their 222 axes.
>
> So, basically, my question is, does anybody know about a program which
> extracts the best 222 axes set from my coordinates?
>
> Thanks in advance,
> Trixie
>
> --------------------------------------------------------------------------
> Trixie Wagner, Ph.D. phone: (804) 982-5764
> Dept. of Biology fax: (804) 982-4896
> Gilmer Hall
> University of Virginia
> Charlottesville, VA 22903
>